The Met Office has issued a yellow weather warning for rain as the Great Ouse burst its banks in Cambridgeshire.
Eleven flood warnings and 62 flood warnings were also issued by the Environment Agency for parts of the UK.
Amber rain warnings cover the south and parts of central Scotland, the Highlands and Argyll and Bute from 2pm until 6am tomorrow.
Heavy downpours and snowmelt on the hills are expected to cause local flooding and traffic disruption.
A separate warning in south and north-west Wales warns of heavy rain between 7pm and 3am tomorrow.
Motorists are advised to be careful on the roads when they have to exit in adverse conditions.
The Met Office said: “Bursts of occasional heavy rain falling on already saturated ground on Tuesday and overnight into Wednesday are expected to cause some localized flooding in parts of western and central Scotland.
“Pillows of 15-25mm are likely, with up to 50mm seen in some locations, mainly in the western hills.
“In addition to the rainfall, rising temperatures will result in a thawing of the lying snow, particularly over the hills and mountains of the north central belt of Scotland.”
Heavy rain last week brought flooding and disruption to transport services across Scotland.
The West Coast Main Line between Glasgow and Carlisle will remain closed until January 6 after a landslide caused “significant damage” to a causeway.
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https://metro.co.uk/2023/01/03/uk-weather-met-office-issues-yellow-warnings-for-rain-18032232/ UK weather: Met Office issues yellow warnings for rain